Create semgrep_diff.yml (#908)

.github/workflows/semgrep_diff.yml

@@ -0,0 +1,20 @@
+# ********************************************************************************
+# Copyright (c) 2024 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made
+# available under the terms of the Apache Software License 2.0
+# which is available at https://www.apache.org/licenses/LICENSE-2.0.
+#
+# SPDX-License-Identifier: Apache-2.0
+# ********************************************************************************
+---
+name: Semgrep Differential Scan
+on:
+  pull_request:
+
+jobs:
+  semgrep-diff:
+    uses: adoptium/.github/.github/workflows/semgrep_diff.yml@main